A new teaser trailer for the third series of Sherlock has been uploaded by the BBC for general viewing.

It initially aired on BBC One on Saturday immediately after The Day of the Doctor, the 50th-anniversary episode of Doctor Who, and has now been posted on both the BBC's YouTube channel and the programme's official website.

This is the second teaser so far for the forthcoming series, with the first one being released in August.

A date for the start of the third series in the UK is yet to be announced, although a sell-out preview screening of the first episode - The Empty Hearse - will take place at the BFI on Sunday 15th December. The new series will start in the USA on Sunday 19th January at 10pm ET on PBS.